Maintenance decision-making method based on equipment comprehensive health condition analysis and management
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A health status and equipment integration technology, applied in the direction of data processing applications, instruments, resources, etc., can solve problems such as inaccurate judgment of equipment health status, achieve the effect of saving maintenance costs and prolonging equipment life
Inactive Publication Date: 2020-05-15
上海安恪企业管理股份有限公司
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Problems solved by technology
[0006] (1) In view of the problem that the existing maintenance methods cannot accurately judge the health status of the equipment, the following methods are adopted: establish a reliability model of the equipment based on the historical failure data of the equipment or reliability databases at home and abroad, and calculat
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Embodiment 1
[0060] Such as figure 1 A maintenance decision-making method based on comprehensive equipment health status analysis and management shown includes the following steps:
[0061] a. Data collection
[0062] Collect all information and data of equipment; including but not limited to: equipment ledger, technical files, failure (defect) records, inspection and maintenance registration form, process card, PID diagram, DCS diagram, HAZOP analysis report, overhaul summary over the years, etc.
[0063] b. Equipment hierarchy division
[0064] According to the collected equipment ledger, determine the level of equipment (components), for example, divide the level into company-workshop-device-equipment (components). The purpose of device hierarchy division is to facilitate device management and use the relationship between devices to establish a reliability block diagram.
[0065] c. Acquisition of key equipment
[0066] Because of the large number of devices in a process business, c...
Embodiment 2
[0083] Taking a reciprocating compressor as an example, the application process of the present invention is described.
[0084] First, carry out FMEA analysis on the compressor, enumerate the possible failure modes, failure locations, failure causes, failure consequences and treatment measures of the compressor. Part of the FMEA analysis content can be found in Figure 8 .
[0085] Secondly, collect the historical fault data of the compressor, some historical fault data such as Figure 9 shown.
[0086] The Weibull distribution model is established by using historical fault data, and the overall reliability operation curve of the compressor and the operation curve of the compressor failure mode are calculated as follows: Figure 10 , Figure 11 shown.
[0087] According to the failure modes listed in the FMEA analysis, add the corresponding condition monitoring variable criteria, such as Figure 12 As shown, the condition monitoring variable criterion is used to infer the...
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Abstract
The invention relates to a maintenance decision-making method based on equipment comprehensive health condition analysis and management. The maintenance decision-making method comprises the followingsteps: collecting data; carrying out equipment hierarchical division; acquiring key equipment; evaluating the risk level of key equipment; evaluating the state monitoring grade of the key equipment; evaluating the reliability level of key equipment; key equipment health conditions; maintenance decision making; device fault management. According to the method, the health condition of the equipmentis comprehensively evaluated from three aspects, namely the reliability level, the risk level and the state monitoring level of the equipment, and the situation that the health condition of one part of equipment is obtained from one side to be overhauled or lost is avoided. A corresponding maintenance strategy is given in combination with the health condition of the equipment, the service life ofthe equipment is prolonged to the maximum extent, and maintenance cost is saved. The fault tree is combined with the state monitoring relation variable of the equipment, and the fault type of the equipment is automatically judged by utilizing the change condition of the relation variable so as to give a reasonable maintenance strategy. The equipment fault, the maintenance record and the operationof the equipment form a closed-loop influence, and the newly added equipment fault record is used as basic data of reliability calculation to re-optimize the reliability model so as to reflect the reliability state of the equipment more accurately and discover the fault of the equipment in time.
Description
technical field [0001] The invention relates to the technical field of equipment comprehensive health, in particular to a maintenance decision-making method based on the analysis and management of equipment comprehensive health status. Background technique [0002] Since the 1950s, with the continuous improvement of industrial mechanization, the maintenance method of equipment has also transitioned from simple after-event maintenance to preventive regular maintenance. However, due to the sharp increase in the proportion of equipment costs to fixed assets and maintenance costs, people began to seek to maximize the life of equipment. Thanks to the application of new technologies such as condition monitoring, fault diagnosis, and FMEA, condition-based maintenance has emerged to select the appropriate maintenance technology to obtain the best economic benefits and the longest service life of equipment, while satisfying equipment owners and users. expectations. The typical repr...
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Application Information
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